"Chelidonium majus, commonly known as greater celandine, is a perennial herbaceous plant in the poppy family (Papaveraceae). It is one of two species in the genus ...
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Chelidonium. It is native to Europe and western Asia and introduced widely in North America.
While greater celandine belongs to the poppy family, lesser celandine (Ficaria verna) belongs to the buttercup family." - (en.wikipedia.org 03.04.2021)